The iambic trimeter derives its name from its essential shape, which is three metrical units (hence trimeter) which are each basically iambic in form. The iambic metron has the following shape (where the x is an anceps, the - is a longum, and the u is a brevis):
Hence, reversing the current running though a wire will have the affect of reversing the direction of the magnetic force at a point some distance away from the wire. The affect that this has on the overall magnetic field depends on the shape of the wire.
Best Answer: There probably isn't a good way to answer this except to say that this is part of Maxwell's equations. The magnetic field produced is such that it would tend to oppse any change in current caused by the changing electric field.But to ask for aything deeper is actually asking why Maxwell's equations are true. And that is a very deep question with perhaps no good answer.he magnetic field produced is such that it would tend to oppse any change in current caused by the changing electric field.